In a world where dragons and Vikings have found an unusual peace, the new generation is ready to write their own story. Hiccup, now transformed into a shrewd leader, faces an unexpected dilemma when an ancient dragon of unimaginable power emerges from the depths of a volcano. This dragon, named Kaelios, possesses the ability to control both fire and ice, and his arrival threatens the harmony they worked so hard to achieve.
As Hiccup tries to protect his community while helping his friend Toothless understand this new and formidable adversary, a group of traditionalist Vikings begins to question his leadership. At the same time, the young Astrid joins the fight, revealing her own destiny as a brave warrior and mother. Together, they must unite with humans and dragons from various tribes to unravel the mystery of Kaelios and his connection to ancient legends.
But not everything will be easy. Along the way, Hiccup and Astrid will have to confront not only this powerful dragon but also their own fears and insecurities about the roles they play in a constantly changing world. With exciting twists, epic battles, and moments of tenderness, this new adventure will offer a lesson about friendship, acceptance, and the true meaning of bravery. Kindness may be the spark that ignites change, even in the darkest moments.